期刊
PHYSICS LETTERS B
卷 691, 期 5, 页码 238-242出版社
ELSEVIER
DOI: 10.1016/j.physletb.2010.06.040
关键词
Top quark production; Hadron collider; New physics
资金
- Ministry of Education, Science and Technology [2009-0086961]
- National Research Council of Science & Technology (NST), Republic of Korea [K-10-L03-C02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [PG021402, 2009-0086961] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Motivated by a possible anomaly in the forward-backward (FB) asymmetry of top quark (A(FB)) observed at the Tevatron, we perform a model independent analysis on q (q) over bar -> t (t) over bar using an effective Lagrangian with dim-6 four-quark operators. We derive necessary conditions on new physics structures and the couplings that are consistent with the t (t) over bar production cross section and AFB measured at the Tevatron, and discuss possible new physics scenarios that could generate such dim-6 operators. (C) 2010 Elsevier B.V. All rights reserved.
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